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    • 11. 发明申请
    • DIGITAL SIGNAL DEMULTIPLEXING DEVICE AND MULTIPLEXING DEVICE
    • 数字信号解复用器件和多路复用器件
    • US20090304031A1
    • 2009-12-10
    • US12296758
    • 2007-05-18
    • Kiyoshi KobayashiHiroshi TanakaHiroshi Kazama
    • Kiyoshi KobayashiHiroshi TanakaHiroshi Kazama
    • H04J1/02H03H17/02
    • H04J1/08H03H17/0266H03H17/0294H03H17/0621H04J1/05
    • A digital signal demultiplexing apparatus for demultiplexing a received signal including a plurality of signals that are frequency-multiplexed to output demultiplexed signals is disclosed. The digital signal demultiplexing apparatus includes: demultiplexing filter bank means including a configuration in which unit demultiplexing filter banks are connected in a multistage manner, each unit demultiplexing filter bank including one or more filters for filtering an input signal and a down-sampler for down-sampling an output signal of each filter to output an down-sampled signal; and frequency conversion and decimator means configured to receive at least one of the received signal and output signals of each unit demultiplexing filter bank. The frequency conversion and decimator means includes frequency conversion means, for each input signal, configured to shift a frequency of an input signal and output a shifted signal, and one or more decimator means serially connected to an output of each frequency conversion means, and the decimator means includes a filter for performing band limitation of an input signal and a down-sampler for down-sampling an output signal of the filter and output a down-sampled signal.
    • 公开了一种数字信号解复用装置,用于对包括频率多路复用的多个信号的接收信号进行解复用以输出解复用信号。 数字信号解复用装置包括:解复用滤波器组装置,其包括以多级方式连接单元解复用滤波器组的配置,每个单元解复用滤波器组包括用于滤波输入信号的一个或多个滤波器和用于下行编码的下采样器, 对每个滤波器的输出信号进行采样以输出下采样信号; 以及频率转换和抽取器装置,被配置为接收每个单元解复用滤波器组的接收信号和输出信号中的至少一个。 频率转换和抽取装置包括用于每个输入信号的频率转换装置,其被配置为移位输入信号的频率并输出移位的信号,以及一个或多个抽取器装置串行连接到每个频率转换装置的输出, 抽取器装置包括用于执行输入信号的频带限制的滤波器和用于对滤波器的输出信号进行下采样的下采样器,并输出下采样信号。
    • 12. 发明授权
    • Perpendicular magnetic recording head and method of manufacturing the same
    • 垂直磁记录头及其制造方法
    • US07495864B2
    • 2009-02-24
    • US11369666
    • 2006-03-06
    • Kiyoshi Kobayashi
    • Kiyoshi Kobayashi
    • G11B5/17
    • G11B5/1278G11B5/312G11B5/3143G11B5/3163
    • A perpendicular magnetic recording head is provided that has a first coil layer is electrically connected to a second coil layer through contact layers. A laminator has a main magnetic pole layer and a gap layer which are formed between the first and second coil layers and above the contact layers. At both sides of the laminator, first insulating layers are formed. A second insulating layer is formed from a top surface of the laminator to top surfaces of the first insulating layers. An inclined surface is formed in each of the first insulating layers, and in the second insulating layer, the inclined surface is formed on the inclined surface of the first insulating layer.
    • 提供了具有第一线圈层的垂直磁记录头,其通过接触层与第二线圈层电连接。 层压机具有形成在第一和第二线圈层之间以及接触层之上的主磁极层和间隙层。 在层压机的两侧形成第一绝缘层。 第二绝缘层从层压机的顶表面形成到第一绝缘层的顶表面。 在每个第一绝缘层中形成倾斜表面,并且在第二绝缘层中,倾斜表面形成在第一绝缘层的倾斜表面上。
    • 14. 发明申请
    • PERPENDICULAR MAGNETIC RECORDING HEAD AND MANUFACTURING METHOD THEREOF
    • 全能磁记录头及其制造方法
    • US20080218908A1
    • 2008-09-11
    • US12037369
    • 2008-02-26
    • Hisayuki YazawaKiyoshi Kobayashi
    • Hisayuki YazawaKiyoshi Kobayashi
    • G11B5/33B05D5/12
    • G11B5/1278G11B5/3116G11B5/3163
    • A perpendicular magnetic recording head includes a main magnetic pole layer; and a return yoke layer laminated on the main magnetic pole layer with a magnetic gap layer formed of a nonmagnetic material disposed on an opposing surface opposite a recording medium. The return yoke layer includes a first throat part opposing the main magnetic pole layer at a side close to the recording medium-opposing surface with a first gap spacing corresponding to a film thickness of the magnetic gap layer; and a second throat part extending to a deeper side than the first throat part in a height direction and opposing the main magnetic pole layer with a second gap spacing greater than the first gap spacing. A throat height determining layer is provided on the main magnetic pole layer or the magnetic gap layer, the throat height determining layer defining a dimension of the first throat part of the return yoke layer in the height direction and formed of an inorganic nonmagnetic material.
    • 垂直磁记录头包括主磁极层; 以及层叠在主磁极层上的返回轭层,其具有由设置在与记录介质相对的相对表面上的非磁性材料形成的磁隙层。 返回轭层包括在接近记录介质相对表面的一侧与主磁极层相对的第一喉部,第一间隙间隔对应于磁隙层的膜厚度; 以及第二喉部,其在高度方向上延伸到比第一喉部更深的一侧,并且具有大于第一间隙间隔的第二间隙间隔与主磁极层相对。 喉部高度确定层设置在主磁极层或磁隙层上,喉部高度确定层限定返回磁轭层的高度方向的第一喉部的尺寸,并由无机非磁性材料形成。
    • 15. 发明申请
    • PERPENDICULAR MAGNETIC RECORDING HEAD
    • 全能磁记录头
    • US20080174911A1
    • 2008-07-24
    • US11943938
    • 2007-11-21
    • Yusuke TomaKiyoshi KobayashiToru TakahashiHiroshi Kameda
    • Yusuke TomaKiyoshi KobayashiToru TakahashiHiroshi Kameda
    • G11B5/127G11B5/31
    • G11B5/1278G11B5/3116
    • A perpendicular magnetic recording head is provided capable of suppressing the magnetic field attributable to the edge write phenomenon and improving resistance to an external magnetic field. The perpendicular magnetic recording head includes a magnetic layer that has a main magnetic pole on a surface facing a recording medium; a return yoke layer that is disposed on the magnetic layer with a nonmagnetic layer disposed therebetween and has a large width in the direction of the main magnetic pole; and a coil layer for applying a recording magnetic field to the magnetic layer. The return yoke layer is provided with such a shape that as seen in the plan view, the return yoke layer is exposed from the medium facing surface with a width not greater than the width in the track width direction of a protrusion region of the return yoke layer that covers the coil layer and the width of the return yoke layer gradually increases as it goes toward the starting point of the height direction.
    • 提供了能够抑制归因于边缘写入现象的磁场并提高对外部磁场的抵抗力的垂直磁记录头。 垂直磁记录头包括在面向记录介质的表面上具有主磁极的磁性层; 返回磁轭层,其设置在磁性层上,其间设置有非磁性层,并且在主磁极的方向上具有大的宽度; 以及用于向磁性层施加记录磁场的线圈层。 返回磁轭层具有如下的形状:从平面图看,返回磁轭层从介质面向表面露出,宽度不大于返回磁轭的突出区域的磁道宽度方向上的宽度 覆盖线圈层的层和返回轭层的宽度随着朝向高度方向的起点逐渐增加。
    • 17. 发明授权
    • Method for manufacturing a magnetic head
    • 磁头制造方法
    • US07305753B2
    • 2007-12-11
    • US11051094
    • 2005-02-04
    • Kiyoshi Kobayashi
    • Kiyoshi Kobayashi
    • G11B5/127H04R31/00
    • G11B5/3116G11B5/1278Y10T29/49043Y10T29/49046Y10T29/49048Y10T29/49052
    • A first magnetic layer is formed on a first magnetic layer formation surface, and then a first material layer-forming layer is deposited on the first magnetic layer formation surface and on the sides and the top of the first magnetic layer and is etched to form first material layers so that the width dimension of each first material layer in the track width direction gradually decreases in the upward direction. Then, a second material layer is formed over the first material layer formation surface, the first material layers, and the first magnetic layer. Then, the first material layers, the second material layer, and the first magnetic layer are polished to expose the upper surface of the first magnetic layer and form the upper surfaces of the second material layer and the first magnetic layer as the same planarized surface.
    • 在第一磁性层形成表面上形成第一磁性层,然后在第一磁性层形成表面和第一磁性层的侧面和顶部上沉积第一材料层形成层,并且被蚀刻以形成第一磁性层 使得每个第一材料层在轨道宽度方向上的宽度尺寸在向上方向上逐渐减小。 然后,在第一材料层形成表面,第一材料层和第一磁性层上形成第二材料层。 然后,对第一材料层,第二材料层和第一磁性层进行抛光以暴露第一磁性层的上表面,并将第二材料层和第一磁性层的上表面形成为相同的平坦化表面。
    • 20. 发明申请
    • THIN FILM MAGNETIC HEAD THAT HAS SOLENOID TYPE RECORDING COIL
    • 具有电磁式记录线圈的薄膜磁头
    • US20070121247A1
    • 2007-05-31
    • US11564754
    • 2006-11-29
    • Kiyoshi Kobayashi
    • Kiyoshi Kobayashi
    • G11B5/127G11B5/147
    • G11B5/3163G11B5/17G11B5/3136
    • A thin film magnetic head is provided. The thin film magnetic head includes an upper coil wire group and a lower coil wire group. Two columns of coil contact groups that are formed on both end portions of individual coil wires of the upper coil wire group and the lower coil wire group and connect both end portions of the coil wires. An insulating resist layer buries a space between coil contacts of the coil contact groups. An inorganic insulating layer buries a space between the two columns of coil contact groups. The upper coil wire group, the lower coil wire group, and the two columns of coil contact groups form a thin film coil that applies a magnetic recording field to the magnetic material layer. The insulating resist layer and the inorganic insulating layer are located at the same lamination height as the two columns of coil contact groups.
    • 提供薄膜磁头。 薄膜磁头包括上线圈线组和下线圈线组。 形成在上线圈线组和下线圈线组的各个线圈线的两端部上并连接线圈线的两端的两列线圈接触组。 绝缘抗蚀剂层埋在线圈接触组的线圈接触之间的空间。 无机绝缘层埋在两列线圈接触组之间的空间。 上线圈线组,下线圈线组和两列线圈接触组形成向磁性体层施加磁记录场的薄膜线圈。 绝缘抗蚀剂层和无机绝缘层位于与两列线圈接触组相同的层叠高度处。